Multiprocessing from callback tkinter

Question content

The problem is when I want to trigger process "multiprocessing" from a callback tkinter (specifically the binding of the function tkinter). The error starts here:

file "c:\users\usuario\downloads\engine_controller_ls\extracttext\funciones\reproductor.py", line 598, in __init__ p.start() file "c:\program files\python311\ lib\multiprocessing\process .py", line 121, start self._popen = self._popen(self) ^^^^^^^^^^^^^^^^^^ File "c:\program files\ python311\lib\multiprocessing\ context.py", line 224, returned in _popen _default_context.get_context().process._popen(process_obj) ^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "c:\program files\python311\lib\multiprocessing\context.py", line 336, in _popen return popen(process_obj) ^^^^^^^^^^^^^^^^^^^ File "c:\program files\python311\lib\multiprocessing\popen_spawn_win32.py", line 95, in __init__duction.dump(process_obj, to_child) File "c:\program files\python311\lib\multiprocessing\reduction.py", line 60 , typeerror in dump forkingpickler(file, protocol).dump(obj): Unable to pickle '_tkinter.tkapp' object

main.py

from reproductor import mediaplayer

def item_selected(event):
    """
    evento invocado cuando el contenido de una carpeta es abierto.
    """
    item_seleccionado = arbol.selection()
    item = arbol.item(item_seleccionado)
    print(item)
    
    #extraer la ruta del archivo y si encuentra espacios unirlos
    ruta = ""
    for element in item["values"]:
        ruta += element + " "

    
    #iniciacion del video
    global reproductor_video

    # cerrar el video para que no se abra en multiples ventanas
    if reproductor_video is not none:
        reproductor_video.closeplayer()
    
    reproductor_video = mediaplayer(ruta, frame_visualizer, frame_botones_procesar, spininicio=inbox_inicio, spinfinal=inbox_fin, spinactual=inbox_actual, mainvideo=true)
    reproductor_video.update_progres_video()

arbol = checkboxtreeview(frame_tree_in)
arbol.bind("<<treeviewselect>>", item_selected)

reproductor.py

class MediaPlayer:
    def __init__(ruta, frame_visualizer, frame_botones_procesar, spinInicio=inBox_inicio, spinFinal=inBox_fin, spinActual=inBox_Actual, mainVideo=True):
        p = Process(target=self.funcion1)
        p.start()
        #p.join

    def funcion1(self):
        cont = 0
        while cont < 100:
            cont += 1
            print("contador =", cont)

I tried the same code in the main function and it executed fine, but from the callback it won't execute.

Correct answer

Original version

The solution is here for those who need it, in fact if it can be launched from an event on tkinter like this:

Translation (Google Translate):

The solution is here for those who need it, in fact it can be launched from an event in tkinter like this:

from multiprocessing import Process, log_to_stderr, get_logger
import time
from tkinter import Tk
from tkinter import ttk
import logging
import sys


def item_selected(event):
    
    my_objeto = objeto()
    button_eraser.config(command=lambda:my_objeto.lanzador(2))
    button_marco.config(command=lambda:my_objeto.lanzador(1))
    my_objeto.start_player()

class objeto:

    def __init__(self) -> None:
        #self.start_player()
        pass
    
    def start_player(self):
        pass
        

    def funcion1(self):
        contador = 0
        while 1:
            contador += 1
            print("Func1: ", contador, self.palabra)
            time.sleep(0.1)
            
            if contador > 80:
                break
        
        q = Process(target=self.funcion3)
        q.start()
        #q.join()
    
    def funcion2(self):
        contador = 0
        while 1:
            contador += 2
            print("Func2: ", contador)
            time.sleep(0.2)
            if contador > 120:
                break
    
    def funcion3(self):
        contador = 0
        while 1:
            contador += 2
            print("Func3: ", contador)
            time.sleep(0.02)
            if contador > 200:
                break
    
    def lanzador(self,mode):
        log_to_stderr(logging.DEBUG)
        logger = get_logger()
        logger.setLevel(logging.INFO)

        if mode == 1:
            self.p = Process(target=self.funcion1)
            self.p.start()
        elif mode == 2:
            self.p = Process(target=self.funcion2)
            self.p.start()
        
    def unir(self):
        self.p.join()
        print("Salio")

    def iniciar_multis(self):
        self.lanzador(2)
        self.lanzador(1)

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